Cell towers in Allan (Drôme)

Antennas are listed at Les Sables- les Coudoulis, Chem de la Gardette, Champagnole, Aire de Service de Montélimar and Chem de Conquet.

The declared supports are a 35 m pylon, at Les Sables- les Coudoulis, for Bouygues Telecom, Free Mobile, Orange and SFR; a 45 m pylon, at Chem de la Gardette, for Orange; a 36 m pylon, at Champagnole, for Bouygues Telecom, Free Mobile and SFR; a 30 m pylon, at Aire de Service de Montélimar, for Orange; a 32 m pylon, at Chem de Conquet, for Bouygues Telecom, Free Mobile and SFR.

The tallest structure is a 45 m pylon at Chem de la Gardette. The median is 35 m, above the Drôme median of 27 m.

Fast 3.5 GHz 5G is declared by Orange alone, on 2 of its 3 masts. 5G is on 100% of masts here, against 80% across Drôme towns with five or more masts.

Systems from 2000 are still on the register. Free Mobile switched on the first 5G here in June 2021; Bouygues Telecom followed in November 2022, Orange followed in December 2024. 2016 was the busiest year, with 11 new systems, most of them 4G.

Approved additions not yet in service are pending on one existing mast, for example Bouygues Telecom (5G 2100 MHz) at Les Sables- les Coudoulis. 1 Bouygues Telecom 5G transmitter is listed as technically operational — installed, but not yet declared commercially in service.

Among the 21 Drôme towns with at least five masts, Allan ranks 12th by mast count.

2 masts belong to Hivory and 1 to TDF.

Nearby, Montelimar (7 km to the north-west) has 22 masts, more than here.

The widest declared gap between neighbouring supports is about 1.8 km, to the north-west of the centre.

Only one mast carries all four networks.

Figures above cover installations declared to ANFR as in service or technically operational, as of October 2026; approved projects are not counted.